Date: Mon, 10 Feb 2025 09:41:01 +0000 From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 165059] vtnet(4): Networking breaks with a router using virtio net driver on KVM host Message-ID: <bug-165059-7501-CYx8wALyA3@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-165059-7501@https.bugs.freebsd.org/bugzilla/> References: <bug-165059-7501@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D165059 --- Comment #40 from Tom Jones <thj@FreeBSD.org> --- Some extra info from demido via irc https://termbin.com/et91 is my wireguard setup that works (but has tiny throughput down to wg client) including iperf tests from wg client to wg se= rver over tunnel, wg client to wg server over inet, and wg server to wg client o= ver tunnel. https://termbin.com/07dl is networking info on wg client. FIXED: i isolated the 'solution' to being adding 'hw.vtnet.csum_disable=3D"1"' to /boot/loader.conf. nothing else needed, and download speed of freebsd (and debian) install isos from wg client became nearly as fast as wg server. this seems related but separate from similar suggestions of disabling tso and lr= o as i /only/ needed to disable csum. keywords: nat, checksum, vtnet. related bugs:=20 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D235607,=20 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D263229,=20 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D165059, https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D259249,=20 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D170081=20 other links:=20 https://lists.freebsd.org/pipermail/freebsd-questions/2021-January/292565.h= tml, https://forums.freebsd.org/threads/wireguard-vpn-slow-speed.73490/page-2#po= st-584231, https://sourceopen.com/index.php/howto-fix-slow-networking-with-a-wireguard= -server-in-a-freebsd-jail-on-a-vps-and-slow-downloads-in-a-jail-on-a-vps/,= =20 https://forums.freebsd.org/threads/nat-low-speed-outside-of-local-subnet.49= 498/,=20 https://serverfault.com/questions/817664/slow-network-fixed-adding-hw-vtnet= -csum-disable-1-what-are-the-posible-side-effe,=20 https://imil.net/blog/posts/2019/freebsd-networking-issues-disable-offloadi= ng-and-checksum/, https://www.mail-archive.com/freebsd-jail@freebsd.org/msg03651.html, more https://search.brave.com/search?q=3Dfreebsd+nat+vtnet+disable+checksum --=20 You are receiving this mail because: You are on the CC list for the bug.=
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